<!doctype html>

<title>05 Properties - React From Zero</title>

<script src="https://unpkg.com/react@15.4.2/dist/react.js"></script>
<script src="https://unpkg.com/react-dom@15.4.2/dist/react-dom.js"></script>
<script src="https://unpkg.com/babel-core@5.8.38/browser.min.js"></script>

<div id="app"></div>

<script type="text/babel">

// Components, like elements, can use properties, too
function MyComponent(props) {
  return (
    <div className={props.className}>
      <h1>Hello</h1>
      <h2>{props.customData}</h2>
    </div>
  )
}

var reactElement = <MyComponent className='abc' customData='world'/>

// Which also works with an object and the spread (...) operator
var props = {
  className: 'abc',
  customData: 'world',
}

reactElement = <MyComponent {...props}/>

// This allows components with dynamic content
var planets = ['earth', 'mars', 'venus']

// If an array is used as "child node" each child needs a unique key-property
var elements = planets.map(function(planet, index) {
  return <MyComponent className='myClass' customData={planet} key={index}/>
})

reactElement = <div>{elements}</div>

var renderTarget = document.getElementById('app')

ReactDOM.render(reactElement, renderTarget)

</script>